| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a multi-polar electric rotary joint having non-lowered transmitting force of electric signals. SOLUTION: This multi-polar electric rotary joint comprises a plurality of luminescent elements 5a arranged on the circumference around a rotating axis of a rotation part 1 and at least one light-receiving element 5b arranged in a fixed part 2. In a manner that light from the luminescent elements 5a moving on the circumference following rotation of the rotation part 1 is received by the light-receiving element 5b, the electric signals are transmitted from the rotation part 1 side to the fixed part 2 side.</p> |
